Gammex 403 GS LE, User Manual

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15
Grey Scale Applications
Metastases are sometimes slightly hyperechoic or hypoechoic compared with the sur-
rounding tissue. If the scanner is not measuring grey levels accurately, the metastases
may not be detected. The Quantitative Measurement ensures that the grey level signal
is measured consistently. The Qualitative Measurement ensures that grey levels are
displayed on the monitor consistently. By performing these tests, the user can deter-
mine the optimal system settings for measuring grey levels, which can then be used in
clinical applications.